Journal
LWT-FOOD SCIENCE AND TECHNOLOGY
Volume 93, Issue -, Pages 32-35Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.lwt.2018.03.008
Keywords
Raw ground beef; Myoglobin; High pressure processing; Colorimetry
Categories
Funding
- Department of Food Science and Technology
- Nebraska Agricultural Experiment Station
- USDA National Institute of Food and Agriculture [232132]
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High pressure processing (HPP), a non-thermal pasteurization technique, can reduce deadly pathogens, such as E. coli O157:H7 and other Shiga toxin producing E. coli in raw ground meat, however, its use is limited due to discoloration. As different states of myoglobin have inherently different color stability, the objective of this study was to determine the impact of those states on the color stability of raw beef patties treated with high pressure processing. Modified atmosphere packaging (high oxygen - oxymyoglobin, carbon monoxide - carboxymyoglobin), vacuum packaging (deoxymyoglobin) or added potassium ferricyanide (metmyoglobin) treatments were used to prepare patties with desired myoglobin states. Color was measured (CIE L*, a*, b*) with or without HPP over a storage period of 21 days. Statistical analysis (SAS GLIMMIX) was run to see the main effects of myoglobin states and HPP treatment and their interactions within each day of storage. While all HPP treated beef patties showed significant (P < 0.001) changes in color with increased lightness (L*) and yellowness (b*), carboxymyoglobin states showed improved color retention, as compared with the other myoglobin states.
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